Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b620d6911553dcb…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 15:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17b0fe65348a7b488e9ee0b3ad3a68ee SHA-1: d26bc43c672357e4e609b5ef6c029c7527b6d5a6 SHA-256: 7b620d6911553dcb2b05491318d228c9c0bc13648f2fd2e87025adcda63e7bc9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link pointing to ttraff.com, indicating a malicious redirection attempt. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure to download a PDF which actually leads to malicious infrastructure.

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=definicion+de+actitudes+segun+autores+pdf
    • http://xewopod.carnivalincovington.com/uploads/1/3/0/9/130969723/72337461a006e.pdf
    • http://files.affinity-artwork.com/uploads/1/3/1/8/131856333/2db9a57eab5.pdf
    • http://files.enaakshikotwal.com/uploads/1/3/1/1/131164063/1064652.pdf
    • http://files.areahearingcenter.com/uploads/1/3/1/3/131378968/1010389.pdf
    • https://cdn.shopify.com/s/files/1/0433/0160/1444/files/one_drive_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/7261/7637/files/pibagakizizudefawukogek.pdf
    • https://cdn.shopify.com/s/files/1/0441/1890/0888/files/bsc_1st_year_math_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/ripowelokegoredifetaliju.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5149/files/gonudajoxazisevode.pdf
    • https://cdn.shopify.com/s/files/1/0435/6784/1443/files/zebifusogafubesaloworivil.pdf
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/xudagekewepofibun.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/wakipuvasox.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9697/files/togoxanikewunizibukos.pdf
    • https://cdn.shopify.com/s/files/1/0439/9942/8766/files/florida_flair_vendor_payments.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/bufilapawekopebe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/alfie_kohn_classroom_management.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006584.bin
a4de0be3e4787507b0d66e2c7b3c12a379555445b31147b70de9a7becea3cf0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6584 5292 bytes
font_01_sfnt_off0000779e.bin
cf61d2e924c630d159788c2294e63dc2ff7e7fc424a87f1b6c2e79ff4db984ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x779E 10636 bytes