Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a6071deb0c48d2…

MALICIOUS

PDF

41.9 KB Created: 2020-08-10 12:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a21dc34fcecfe39dee5f06e79bd18c73 SHA-1: 6da3fcf1bd331a96aaed5803e65abec3ee021ddc SHA-256: 98a6071deb0c48d26e2690f28ad637ed52e07f0a712539b5a1ef0fdef3fdfd3f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=react+js+tutorial+download+pdf'. This indicates the document is designed to trick users into clicking the link, likely leading to a malicious download or phishing page. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt to increase visibility. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=react+js+tutorial+download+pdf
    • http://files.annabellalwin.com/uploads/1/3/0/7/130738971/77828f05db.pdf
    • http://files.shadypinesrvpark.net/uploads/1/3/2/6/132681951/807657.pdf
    • http://files.actscommunitychurches.com/uploads/1/3/1/4/131408942/zaxomuzojanol.pdf
    • https://cdn.shopify.com/s/files/1/0434/4440/4374/files/citroen_berlingo_2020_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/falodirudevetivujifobafow.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/vesulujufudedelowemid.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2327/files/59146294231.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4040/files/butcher_shop_floor_plans.pdf
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/15381090944.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7637/files/apprendre_le_franais_pour_les_petit_gratuitement.pdf
    • https://cdn.shopify.com/s/files/1/0440/7453/3014/files/fifip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/tokefobikezumepem.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/brother_mfc-_j5910dw.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/nolugilinonagij.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/kigozegovawo.pdf
    • https://cdn.shopify.com/s/files/1/0448/4923/4081/files/oxford_school_thesaurus.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4344/files/92614566257.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_off00006550.bin
ff638cdf1727e4f8adf4d1b6f1de25a751a2829b6a32ec88eb2b1bcb042300be
pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 5324 bytes
font_01_sfnt_off00007793.bin
db0a2d8ba50f57f28926b370e3fc292a048ad1433089ad513300f8d90a56aeeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7793 10444 bytes