Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d344d10c76211f6…

MALICIOUS

PDF

43.8 KB Created: 2020-08-01 15:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7f18c3371eb5a9a672be24b1567fdfe SHA-1: f66d2be2cb68aaf6b5eeb1adcd677c84d0aac2e5 SHA-256: 1d344d10c76211f6ebde55cb72712fa05e7208d13e123fc583597e68c016b0a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ibm+lotus+viewer'. This URL is likely used to lure users into a phishing or malware download site. The document also exhibits a PDF link farm heuristic, indicating it contains numerous external links, many of which are hosted on Shopify but some point to potentially malicious domains. No scripts were extracted from this sample, but the presence of multiple suspicious URLs and the ML classifier's high confidence suggest a malicious intent.

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.cc/pify?keyword=ibm+lotus+viewer
    • http://files.queenslandcallers.com/uploads/1/3/1/4/131437984/81dd234e09.pdf
    • http://files.qwistjoseph.com/uploads/1/3/0/8/130874424/94b73.pdf
    • http://files.orchardviewchoir.com/uploads/1/3/1/6/131637255/fiwujiralagu-vapamazazuwega.pdf
    • http://files.elcachurchesofnemt.org/uploads/1/3/1/4/131406999/pafekozuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/mother_3_barrier_trio.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/89793427406.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7626/files/xezawarenedop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20785775646.pdf
    • https://cdn.shopify.com/s/files/1/0432/8341/5204/files/99283027040.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/98732000505.pdf
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/72720039252.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/xifuvovajif.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/fuwewabigefojib.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/62366874231.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/finesokagofebagovuw.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dde.bin
3dc90c581ed74377dadbc8dd75d98f1113631e0d1b019e9bb62ab0bcc61bb023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 4848 bytes
font_01_sfnt_off00007e59.bin
680a7ecb9d71e2dba476616b6f261aaaf4d53ddc7da4baf6ba7d698a8972b195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E59 10516 bytes

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