Malicious PDF — malware analysis report

Static analysis result for SHA-256 6483a1b1800f0aa5…

MALICIOUS

PDF

41.6 KB Created: 2020-07-26 21:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a92a07a8eb8dc9765728a50211944459 SHA-1: 2f441d7f765ecf037048ffb6764b3e61b6c5047e SHA-256: 6483a1b1800f0aa55efc24d968a80832b408308b81ebe4d1fc288313a7ce3ed6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits a PDF link farm heuristic, indicating a large number of outbound links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links suggests an attempt to redirect users to harmful content, likely for phishing or malware delivery.

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=flannel+sheets+queen+walmart
    • http://files.byetheye.com/uploads/1/3/0/7/130775704/xajivomivozurup_tilape_boxizerebof_sovur.pdf
    • http://files.faithutah.com/uploads/1/3/1/8/131857544/f87700c.pdf
    • http://files.koehlerscale.com/uploads/1/3/1/3/131382030/1461808.pdf
    • http://files.harrietcamerondesign.com/uploads/1/3/2/3/132302876/9774904.pdf
    • http://files.scstagelighters.org/uploads/1/3/1/4/131412558/609404.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/molafuran.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94766401197.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/nujaxatefubavamimejitux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/rebanibumolol.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/53262369928.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/75544821533.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/99729536227.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/28792890459.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/65289781706.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/93900252014.pdf
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/gusepomotabedanipawi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/tuvuga.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_off00006675.bin
f7e9daf081361500058223826215091002d06a1f786df80563d39e4472d48bfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 4820 bytes
font_01_sfnt_off000076b1.bin
a8794fbd90baccae3e4b81ac18e8758a5d97834552d3b0862f024315f7cdfa0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B1 10104 bytes

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