Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d2a55377b678eb…

MALICIOUS

PDF

53.0 KB Created: 2020-07-26 09:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d808dc232ac68b246f65511f82cddc98 SHA-1: 57a36944259d213470414150054f0e1fff19ea71 SHA-256: 70d2a55377b678ebbca3bbbe7c661bf375fad04e0c2ea73c5b206ee38408ec1b
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a payment redirection lure, indicating an attempt to trick users into believing there are new or changed bank instructions. It also contains a critical heuristic for a malicious redirector link pointing to 'ttraff.ru', which is likely used to host the final malicious payload or phishing page. The document body, though heavily obfuscated, contains text related to 'calculator hide app lock', potentially a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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=calculator+hide+app+lock
    • http://files.wandapayne.com/uploads/1/3/0/7/130739567/e9f4b5f19c4877c.pdf
    • http://files.gvai.org/uploads/1/3/1/4/131453917/dijad-kutajezogak-zomulam-bajomeriko.pdf
    • http://files.regulatorycheckbook.org/uploads/1/3/1/4/131453536/fikunugutumowi_fenazaxuwanezuj.pdf
    • http://files.wendytanus.com/uploads/1/3/1/4/131437532/53a03a8cb08.pdf
    • http://files.washington-commons.org/uploads/1/3/0/8/130814411/xulem_pujifajikizuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/pepudopatakolo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/vobirok.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/lepaliveju.pdf
    • https://cdn.shopify.com/s/files/1/0435/4503/4911/files/33781085913.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/71268729738.pdf
    • https://cdn.shopify.com/s/files/1/0436/1987/7026/files/tetojatafisamavilemigivuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/pasuxizu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/48147647645.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/55498511267.pdf
    • https://cdn.shopify.com/s/files/1/0431/9949/6351/files/buvomewufizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/51119016833.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6071/files/vupekuxiromaxasat.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072ae.bin
96561dc8da191ee30b22d4879060d1443137114400cc4af4eedb5722e5b6e3b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AE 4848 bytes
font_01_sfnt_off00008331.bin
98de79b297e3797e740cfbde3538a37bcda84e2cac2672723d669a8421f405b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8331 2012 bytes
font_02_sfnt_off00008c68.bin
30d7ca0464c8ea4d990e4f3001db07fb3a62a3180c15285ae9bc40b65e3bf65f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C68 10456 bytes
font_03_sfnt_off0000af88.bin
940587323d1947cc4b80e71b5b4e07368006354cf7486a89facd564ccfbbb5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF88 16664 bytes

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