Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bcb12514329698c…

MALICIOUS

PDF

46.5 KB Created: 2020-07-31 06:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b06264c5b7d7371bb081296a71a38e10 SHA-1: c71f8d4d384f0e123a3336e80fecf6b47f561d22 SHA-256: 5bcb12514329698c4e79e82eff2e4a8035a7c948527e23fc559bdbc47251fbec
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'free cute printable calendar 2020 pdf'. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to potentially harmful sites.

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.ru/pify?keyword=free+cute+printable+calendar+2020+pdf
    • http://files.pkpowders.com/uploads/1/3/0/8/130874278/043f45.pdf
    • http://files.nurudeemjean.com/uploads/1/3/1/4/131406344/fazikuwa.pdf
    • http://files.commongroundforafrica.org/uploads/1/3/1/3/131384113/fuzone.pdf
    • http://files.hairtieandpecanpie.com/uploads/1/3/0/8/130874490/fadov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7976/8995/files/34258756318.pdf
    • https://cdn.shopify.com/s/files/1/0436/9927/3896/files/kudoxav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7023/4524/files/20275348342.pdf
    • https://cdn.shopify.com/s/files/1/0439/7219/8558/files/pelunoludisesogisosav.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/morifebidizevarugofa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/putugikokoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/50540105260.pdf
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/tonopofekalutemoxujim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/fumopuziketetarid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/rukakiwajapiwokagibego.pdf
    • https://cdn.shopify.com/s/files/1/0440/6493/1992/files/manalijumij.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/10293407807.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/tikogano.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_off000078b9.bin
eaf662a6b1579f55bd318844fa01ab8cd44de5dcf376692420f4f60289bec627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B9 5112 bytes
font_01_sfnt_off00008a1c.bin
8fe04c589fa04ec81b0faca8274b84ef02ea2b486af844dbfef36f81a64f51fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1C 10048 bytes

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