Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e51f31f4285b8e…

MALICIOUS

PDF

49.5 KB Created: 2020-08-08 23:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be15030693a4021e1a88ee5c36ece5c5 SHA-1: 70fd920b39952aba66fbe8e13b22843e8bc59bc9 SHA-256: 12e51f31f4285b8e4cf4c2277dd17f84f2735f65f43da13b032898f04c75ab49
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious objective. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly suggest a phishing or malicious redirection attack.

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=fungsi+kurikulum+pendidikan+islam+pdf
    • http://files.elikalnonwoven.com/uploads/1/3/0/8/130814208/2d41ec9126ebed.pdf
    • http://files.ballyhoo.ca/uploads/1/3/1/4/131453944/8942757.pdf
    • http://files.iepconsultingwithcatherineevans.com/uploads/1/3/0/7/130776674/2155339.pdf
    • http://zuriki.harchumanservices.com/uploads/1/3/1/4/131453850/kiwafajomulorase.pdf
    • http://files.robertsonbookreviews.org/uploads/1/3/2/3/132302963/95b71dc93406cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0805/7759/files/sat_math_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/dosifapogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/99768665677.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/zuvesibobusojedivekariroz.pdf
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/zufijifofirizetutubuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/kuvuzupelireronuve.pdf
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/21106015552.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/70935751742.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/88151932711.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/16053523779.pdf
    • https://cdn.shopify.com/s/files/1/0429/0484/6503/files/71555067345.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/48816242516.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6541/files/gulixopopozezinara.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006884.bin
918b9980777f1a5e606218c0c4398b9add9097ec1406de793a34370046b3d9ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6884 5380 bytes
font_01_sfnt_off00007ac3.bin
205e473a12e82dbe37f185ec88481f066164393062758b6f764179661b2201ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC3 10216 bytes
font_02_sfnt_off00009d92.bin
6177ca0e5fb383ee308574fa73dc3abd8d34af958d0ddfdf28782e04b496bb7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D92 17660 bytes

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