Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5d31d8885b36f6…

MALICIOUS

PDF

40.0 KB Created: 2020-08-29 19:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c560f13bc9afa7c5a19ac9a7b81eb93c SHA-1: c8d34ec9eac707c288f9a79788393374a13f1731 SHA-256: fd5d31d8885b36f6cad135f94766d33dcbea9aadac90babcb97d48440a27a0db
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links that point to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, appears to be a lure related to a service manual. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a probable attempt to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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/wix?keyword=mitsubishi+mirage+2013+service+manua
    • https://static.usrfiles.com/ugd/b8c837_30a319ecbfb8443d8351d97a3c243ee1.pdf
    • https://static.usrfiles.com/ugd/b8c837_361361c48d774611bbb67d4743eaf568.pdf
    • https://static.usrfiles.com/ugd/b8c837_94a74801f76b4755a92aa15516616763.pdf
    • https://static.usrfiles.com/ugd/384ea4_83f73c3ff2574371bf78494878994b66.pdf
    • https://static.usrfiles.com/ugd/b8c837_568b5700e054400c9156c8f7122a5a15.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/dazubofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6614/files/pinotezawikuroxisavexaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/pekugumo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/architecture_vernaculaire.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc0a1e00c05c47cbb3a4919759a81a06.pdf
    • https://static.usrfiles.com/ugd/b8c837_a29c0173d06040b0b845b4705acdf5d5.pdf
    • https://cdn.shopify.com/s/files/1/0441/2515/9576/files/novamivigirexifikazewa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6517/files/wuxorakopuradefema.pdf
    • https://cdn.shopify.com/s/files/1/0462/0088/1315/files/zopuridukewomamugitenes.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_off00005bad.bin
bc912e1f4042e77349e06957832907e22f2cfe0359abf23c373e708172b76737
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAD 5876 bytes
font_01_sfnt_off00006f94.bin
c4b4c3783b231a2cdc0c51b8428c70a056b98b962fa3b927f86fb5846e3f043e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F94 10480 bytes