Malicious PDF — malware analysis report

Static analysis result for SHA-256 852db6ff7adcdcb0…

MALICIOUS

PDF

47.4 KB Created: 2020-08-10 19:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d65d077bf0f2a5bdfd869cbfe254d167 SHA-1: 00aabddf66b53e15a21c6e6d1647f03c633f18c8 SHA-256: 852db6ff7adcdcb00b58c96ea0fc0287b1aad037fe3f237e3dfe21082a6cb394
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially corrupted, includes the text 'Antiemetics drugs pdf' and the URL 'https://ttraff.com/pify?keyword=antiemetics+drugs+pdf', suggesting a lure to a malicious site. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content.

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=antiemetics+drugs+pdf
    • http://kevalexiw.fijianmermaid.com/uploads/1/3/1/0/131070450/wutefimomunul.pdf
    • http://sugukobuj.centralindianaiscebs.org/uploads/1/3/1/1/131163599/fixare_pasimikosis_luviz_vapajudivuk.pdf
    • http://dasapidun.thedillybag.net/uploads/1/3/2/8/132816202/3f4e5.pdf
    • http://files.ddawork.com/uploads/1/3/2/6/132682989/nutirotix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/sofumowexozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/89575852101.pdf
    • https://cdn.shopify.com/s/files/1/0438/0606/4801/files/97349615470.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/49117384003.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/19486561968.pdf
    • https://cdn.shopify.com/s/files/1/0448/3085/1233/files/calendrier_retransmission_coupe_du_monde_rugby_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/68449013569.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/subetaseropalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5089/files/82420224026.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/9947217918.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/tf_2_jump_script.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/79016284009.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_off00007526.bin
ec37d34b2b1897aa27e347506c25ed6924cdd0dcf64b4d4d2b327788873e3fb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7526 5224 bytes
font_01_sfnt_off000086d1.bin
41e908ba00267b2556777200860849d85cec2c24062ccd4a0d031cdba42c82b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D1 13152 bytes

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