Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d4de0cc74c89c3…

MALICIOUS

PDF

49.8 KB Created: 2020-07-30 16:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da7cd0c339afdd856fab2991fc1ae6ad SHA-1: c352ca4030758b461c3436ec3d7d40ca0ff094a0 SHA-256: 14d4de0cc74c89c35166c353b4b27de03459878c2c9847fb405b13667a7b6a97
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=bangla+comedy+sruti+natok+script+pdf`. Additionally, it exhibits characteristics of an advance-fee scam lure, suggesting the user is enticed to click the link for a prize or parcel. While no scripts were extracted, the presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/pify?keyword=bangla+comedy+sruti+natok+script+pdf
    • http://files.fabuliciousteaching.com/uploads/1/3/0/9/130969080/nisuzojikukij.pdf
    • http://files.ismsiliconvalley.org/uploads/1/3/1/3/131383924/3327115.pdf
    • http://files.glenislaagainstturbines.com/uploads/1/3/1/6/131607827/ripulafovapi-pamosobavaduw-tizenexosebev-saduj.pdf
    • http://files.aaadatacom.com/uploads/1/3/1/8/131871535/5be2dbdadd3e8f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/72716094242.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/42265106583.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/22456931201.pdf
    • https://cdn.shopify.com/s/files/1/0432/8787/1646/files/17351633481.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/8083669485.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/28671485839.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/sodutatonobipanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gefoviliruvowej.pdf
    • https://cdn.shopify.com/s/files/1/0438/3758/7606/files/lavezimuvovikur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/84620168623.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/68245687195.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6966/files/31419602060.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9319/files/nuxuvuzefe.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070c7.bin
fbc740b4886fc8aedfb3ea8f98c6da5ffd1bc59418a41680326eaba511027391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C7 5572 bytes
font_01_sfnt_off000083a2.bin
a8dda5b1872f0957a4ba3bb2e2de794fabd164ce0091d09f6d0edb7435b08921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A2 5572 bytes
font_02_sfnt_off000095ca.bin
7eb17d4767870ba474770e023374a6eac0b1b34c00ac2a24bc6744cc056ea927		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95CA 10440 bytes

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