Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bea45b9d038b46a…

MALICIOUS

PDF

44.6 KB Created: 2020-08-02 14:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f194db8ec13519c7366bddef1ca569cf SHA-1: 306d6136a34295cb3720d2184d2bf305e87c860e SHA-256: 7bea45b9d038b46a6687946761e30c5c18d479c6400d7840a31cfcc1be0fee51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search results or direct users to malicious content. No scripts were extracted, but the document's structure and link farm are indicative of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=python+create+folder
    • http://files.clclife.com/uploads/1/3/1/8/131871494/seduto-satuzi.pdf
    • http://files.falconathleticsnj.com/uploads/1/3/1/3/131398259/diketimujosuv-gavegovi-nobosusawa-tegeso.pdf
    • http://files.boxboardstheatre.com/uploads/1/3/0/7/130740443/tugisoveroro_figimapapanat_jogab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/57005035999.pdf
    • https://cdn.shopify.com/s/files/1/0432/7810/6779/files/scp_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/34116221742.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/47051346451.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/jacquie_lawson_birthday_cards.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/82206773022.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdf
    • https://cdn.shopify.com/s/files/1/0432/1463/5165/files/vojesironudesesalo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/furupokexopaxabisovijuwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/novokipotenewi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8775/files/the_universal_traveler.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000700d.bin
6ad177808c7c43e96575406e09fce3e687097e8cd53a785a6d69b8e3eef0d4f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x700D 5036 bytes
font_01_sfnt_off00008131.bin
1998775ef117ac2142f4d88ad7c08c96d8cb3352a687685cbcca89a0070a745f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8131 10640 bytes