Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f54c7e69d4ddeb…

MALICIOUS

PDF

40.1 KB Created: 2020-08-11 19:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb7de26a05c0781e876f25616fdfbc19 SHA-1: 7a46ded7e46653f6efb5dfc66b2a6cb616e86837 SHA-256: 03f54c7e69d4ddebe5383b5f70877f0161b821c64f23e7475633585b1dfa7157
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are hosted on Shopify and appear to be part of a link farm designed to improve search engine rankings. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=system+reliability+theory+models+statistical+methods+and+applications+pdf`. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing.

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=system+reliability+theory+models+statistical+methods+and+applications+pdf
    • http://roraliwug.kipreschool.com/uploads/1/3/0/9/130969060/konime-gopipidedumova-robokazawi.pdf
    • http://files.anvilcityscienceacademy.org/uploads/1/3/0/8/130874359/jixiwonejejuko.pdf
    • http://files.regionfiveadulted.com/uploads/1/3/1/4/131483147/funolix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/31791777286.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/16439355874.pdf
    • https://cdn.shopify.com/s/files/1/0440/6509/5845/files/32505173582.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/88818189669.pdf
    • https://cdn.shopify.com/s/files/1/0437/5363/5989/files/valigozetonubidatuxezog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/81267145587.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/o_mio_babbino_caro_piano_accompaniment.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/xogadifegijar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sezam.pdf
    • https://cdn.shopify.com/s/files/1/0434/9919/2472/files/sijuvekosaxudir.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/220835938.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/benala.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/tiluxix.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/space_engineers_split_stack.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_off00005b12.bin
e2fe49a4ba63d306c6ec4d37394cfac7dbd61773b298621d261a618692dd38a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B12 5740 bytes
font_01_sfnt_off00006e65.bin
42379e5877c78d22c9ad7f3129e4fbb980d66ee618872a7293c3697c5428be3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E65 10536 bytes

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