Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb1c957bbc0f883…

MALICIOUS

PDF

49.0 KB Created: 2020-08-07 00:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d22eb1ad9ad951f4609662ab8484bcab SHA-1: c872c2f9baae7e2cebfa2773d716ffbd81ef2d49 SHA-256: 7bb1c957bbc0f883217c5f4ddc94a3dd268f9facd9e6694249cf027ec656c995
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to appear as legitimate documents but redirect to a malicious URL, specifically 'https://ttraff.cc/pify?keyword=ejercicios+de+movimiento+rectilineo+uniforme+retardado+resueltos+pdf'. This technique is commonly used in phishing campaigns to trick users into visiting malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=ejercicios+de+movimiento+rectilineo+uniforme+retardado+resueltos+pdf In PDF document text
    • http://files.fusetheatercompany.com/uploads/1/3/0/7/130775868/zifozi_susofogekuvopu_mewubunog.pdfIn PDF document text
    • http://lazedegu.renatasellitti.com/uploads/1/3/0/8/130874304/dolosa.pdfIn PDF document text
    • http://files.rrcustomcontractors.com/uploads/1/3/1/0/131070294/923718ef58c1.pdfIn PDF document text
    • http://files.repaythis.com/uploads/1/3/0/7/130740180/3539141.pdfIn PDF document text
    • http://gegegul.oldhatflytying.com/uploads/1/3/0/7/130740178/vikigure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/65904414803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9584/files/28686788711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/kojimoluwep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/40k_harlequin_codex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1116/0738/files/tapogetizojawitafagere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0827/files/59633749454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/nvidia_gtx_970_drivers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/panama_city_beach_surf_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6139/5102/files/78050345398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/entrepreneurship_development.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/pudomumojejewasuzogola.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D0 5392 bytes
SHA-256: e138011935f60fb41513bc61da7ae34ffe273da103766d33c55b386d24456c74
font_01_sfnt_off00007b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B21 11436 bytes
SHA-256: 3050d6847e6da8a8cfdb385f4f663ec5fec92e199d528307a635aa8235c6b9f7
font_02_sfnt_off0000a067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA067 16232 bytes
SHA-256: 4df7d432bfacd39d9a4c50cb09915c8cacbf036009741f9c9314eb7fae48a072