Malicious PDF — malware analysis report

Static analysis result for SHA-256 11eedfd212f25344…

MALICIOUS

PDF

43.9 KB Created: 2020-08-01 14:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e64458bda12cb270e7fe7678beaf7e1 SHA-1: 58d713f2c81d38e756120dc02c300fe09e77f405 SHA-256: 11eedfd212f25344149bceb3fc141b7e773a0bbbbc8e8355b5bb4ee092e71ffa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One of the primary links directs to a malicious redirector at `ttraff.com`, disguised as a solutions manual for organic chemistry. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam attempt.

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=organic+chemistry+solutions+manual+pdf
    • http://files.sophiewarner.co.uk/uploads/1/3/1/4/131438397/fozaz.pdf
    • http://files.gaiasgardencove.com/uploads/1/3/0/9/130968934/9056f1555c.pdf
    • http://files.coulterhouseapparel.com/uploads/1/3/2/7/132740435/fozuwudobosexuguw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/pibapomuvotep.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/75356232907.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2707/files/wemoduxomozenunijoluv.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/fizabefepuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/puxekadawepajolufazez.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/15899390989.pdf
    • https://cdn.shopify.com/s/files/1/0431/7390/4545/files/xavubibamagumumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/52033570187.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/pipapizazur.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/namavuwopeberodarovev.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1142/files/nuvaxazamogapumu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea4.bin
e11148ae0cfa68a7141e86b21145c98f4ed4cb24c808188d8be44f59a4033e09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA4 5580 bytes
font_01_sfnt_off0000716f.bin
33510a6db36aa03bf9addf9a3a2b2cfa00c30d657f385f0a00dcc499474ede42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716F 9744 bytes
font_02_sfnt_off00009294.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9294 4324 bytes

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