Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcb714a659781fe…

MALICIOUS

PDF

51.9 KB Created: 2020-08-23 02:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37e8c41e77e17a165156ae7090e5e37a SHA-1: 79cff99ec796f3f5f031f6275b2eca9a28b382f5 SHA-256: 6dcb714a659781fe1ed4e880fb7de363b337b50cb7713ec6522b0e2c7ea4a30c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector, ttraff.com, which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Autocad 2013 xforce keygen 64 bit', suggesting a lure for pirated software. The presence of numerous Shopify links, many pointing to PDF files, indicates a link farm strategy to improve search engine ranking for malicious content. No scripts were extracted, but the overall structure and malicious URL point to a phishing or malware distribution 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=autocad+2013+xforce+keygen+64+bit
    • http://files.hopespayneuter.org/uploads/1/3/1/1/131164440/luzoxexafase-pigukewuxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7258/5881/files/lofipuwasu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/dirigamozotelala.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/snurfle_meiosis_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/6086363085.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/48481737524.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/wofezoxenikimefumizobo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/miller_and_levine_biology_textbook_glossary.pdf
    • https://cdn.shopify.com/s/files/1/0438/9673/3864/files/30013191554.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4981/files/31307545850.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/65938652716.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/xugapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/breathless_song_dance_video.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b67.bin
1a4d7428d627b6be647b8ba46602863085f4388fafbc0a75c1735562941ea457		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B67 5956 bytes
font_01_sfnt_off00007fc6.bin
dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC6 1796 bytes
font_02_sfnt_off00008850.bin
b9de4a3884e409d7bb2d12eeedcb269124585ee49981462bfbcc4c1f61e7baac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8850 14204 bytes
font_03_sfnt_off0000b439.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB439 4324 bytes

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