Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ce6e9f6efd2cd2…

MALICIOUS

PDF

43.3 KB Created: 2020-08-14 03:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74a48f9a7cbe38ff6adb132698a27fad SHA-1: a3f66872ae64626401288d847cd747815fa84d46 SHA-256: 66ce6e9f6efd2cd2ecf5e9f37b3633fa64367ce068ad84a51b66d73465a87d3e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=chillerama+2011+subtitle+indonesia'. Additionally, it exhibits characteristics of a link farm with numerous external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to lure users to malicious content, likely for phishing or malware delivery.

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=chillerama+2011+subtitle+indonesia
    • http://files.tarheelwrestlingclub.com/uploads/1/3/0/9/130969184/1291201.pdf
    • http://files.ministerdebweddings.com/uploads/1/3/1/4/131453106/fugazelibuw_mapovazefow_bunefe.pdf
    • http://files.ebanhelsinki2019.com/uploads/1/3/1/3/131384442/gizonazofu.pdf
    • http://files.deafcatholicjoliet.org/uploads/1/3/0/9/130969172/bezalofosoxeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1116/8664/files/85714510000.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/ahmad_jamal_poinciana.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/38502645556.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9573/files/chemistry_textbook_class_11_gujarat_board.pdf
    • https://cdn.shopify.com/s/files/1/0450/1274/6390/files/wadokosokasob.pdf
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/93721411407.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1879/files/gazanokebegafenumivisosa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/czasy_angielskie_wiczenia_liceum.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/lizozogojaxolejozimeforuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/bejarenevivugodiluxufap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/wosekuke.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_off00006b73.bin
af390b3222663700b2a1dc7314c92f365bae16bdf96887893c8c1908d62bf2f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B73 5436 bytes
font_01_sfnt_off00007dbd.bin
c9a8d4e83193e93497f9f50e890cb34891f7baca80e449ebe390f2156a079076		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBD 10276 bytes

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