Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd9285840852b06…

MALICIOUS

PDF

48.5 KB Created: 2020-08-08 21:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c45014a7867f1c342bb4e73fd16b9b3 SHA-1: 68be58b44800edfc027c33e655f85be140768b09 SHA-256: 8dd9285840852b064b80eef74f58a3c9d9b1939dbae8657044cdacab1fb477e6
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=balanceamento+quimico+exercicios+pdf+com+gabarito'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0430/8307/1650/files/toluxen.pdf'. The document body, though partially obfuscated, contains text related to chemical balancing exercises and references wkhtmltopdf, suggesting a lure to disguise malicious redirection.

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=balanceamento+quimico+exercicios+pdf+com+gabarito
    • http://files.chacotravel.com/uploads/1/3/2/6/132681293/zimukojoga.pdf
    • http://files.northposeybasketball.com/uploads/1/3/2/6/132696112/pamokidorozix.pdf
    • http://files.countrychicksoaps.com/uploads/1/3/2/7/132712358/dufekaweni-budile-gilobemoniz-pomewed.pdf
    • http://files.francais.brainintegration.net/uploads/1/3/1/8/131856365/d12c0635d240.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/toluxen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1829/files/texitaxisafiwuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/paxalabidawekadur.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2557/files/anestesia_local_en_odontologia_pearrocha.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/zaparugugoxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/7420302851.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16494210232.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7011/files/eve_s_apology_defense_of_a_woman.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/18893624719.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006653.bin
d9eb4a6120ea016b30114cb131a3221ed83c26ec4383e7d40e50d43a01dc9751
pdf-font-stream PDF embedded font (sfnt) at offset 0x6653 2864 bytes
font_01_sfnt_off00007085.bin
50b82e51ebf906b7e095a4abf89ed5e84730fda8090445238afddf5732151815
pdf-font-stream PDF embedded font (sfnt) at offset 0x7085 5740 bytes
font_02_sfnt_off000083e9.bin
cbfab739f33353afaa641658f5b808f106836307e724e02ddaaee6ba555e008f
pdf-font-stream PDF embedded font (sfnt) at offset 0x83E9 10044 bytes
font_03_sfnt_off0000a637.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA637 4324 bytes