Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ff01df14e91ddf…

MALICIOUS

PDF

43.4 KB Created: 2020-08-09 22:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f6eccb605ca2b48e87d06777ed11fa7 SHA-1: 53590f214fbcf69719a216523c85b82a4898c4da SHA-256: d1ff01df14e91ddf1111bbd54b17b4485c39eb98cb49c141242005c303a90b3f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.ru. This suggests a link farm or SEO poisoning tactic to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. 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/pify?keyword=pdf+marketing+planning+and+control
    • http://files.hollywoodroadchurchofchrist.com/uploads/1/3/0/9/130969686/sebovotezo-deram.pdf
    • http://files.ailiniwan.com/uploads/1/3/2/7/132740296/453030.pdf
    • http://gamasavet.whippoorwillwoods-raynham.com/uploads/1/3/1/4/131453574/8270288.pdf
    • http://kenek.christierecords.in/uploads/1/3/0/8/130874368/zobani_zemilo_linalogusiduses_bixomesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5766/7487/files/budismo_soto_zen.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2746/files/77315348818.pdf
    • https://cdn.shopify.com/s/files/1/0428/7610/8956/files/13616329708.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/29592058479.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/44185638257.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/tzhaar_fairy_ring.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/dupuxixipivonide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/25794816907.pdf
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/assembly_language_programming_of_8086_microprocessor.pdf
    • https://cdn.shopify.com/s/files/1/0441/1061/0584/files/kevixawuxuferixuroxixor.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/1039071189.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6645/files/pevunuv.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_off00006c04.bin
d16971dd812fdd0b264897ed90a797b1e02bd61a7c0e9fdc920a2134e16128f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C04 5364 bytes
font_01_sfnt_off00007e30.bin
8b7062f57ba21901b0963ee3e9bfaa8e147f1609946bcaec2b506782d6201e6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E30 10020 bytes