Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e56d41346968199…

MALICIOUS

PDF

50.6 KB Created: 2020-08-22 18:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9d4988b4d6b10fe88692b5fe34b301 SHA-1: a3b93a0515c2f369851453081f7f61902a23f86f SHA-256: 7e56d41346968199d9876accc7f24f67785ff7f1a852e3114f7e8680dad77b53
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and URLs, suggesting an attempt to disguise malicious content and potentially leverage SEO techniques to lure victims.

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.ru/pify?keyword=austin+mahone+what+about+love+video
    • http://files.lonniefeather.com/uploads/1/3/1/3/131382243/8334960.pdf
    • http://dapuv.blendedscience.net/uploads/1/3/0/7/130776644/wudaru_vepexojuzod_sajamevukotal.pdf
    • http://fijexivel.theinfiltratedeye.com/uploads/1/3/0/7/130776445/pojonelijegebub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9529/4105/files/what_is_a_pci_device.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/gaketujegez.pdf
    • https://cdn.shopify.com/s/files/1/0430/0429/7375/files/pamumefimeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/33899271041.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7985/files/drayton_digistat_3rf_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6975/7850/files/dudufupimuzujekukolok.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/dell_r740_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/16219475651.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0181/files/vupadetisefiboziluneb.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/turaforetesubiliw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3691/files/65525915923.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/32030897764.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_off00007cb4.bin
a2b1590dc0d78e908e454be8853830042b3d7c3de8ee24a7434b6b8588160046
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB4 5248 bytes
font_01_sfnt_off00008e6f.bin
0800836f6cfa7db585cd47a37bc1b96c891df059485905856755e406191eb953
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6F 16116 bytes