Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f5a6e279d1623ef…

MALICIOUS

PDF

42.6 KB Created: 2020-08-02 12:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe40c3f5042dd630eb224be2b28e6154 SHA-1: caddb6da381c64e946e70371b3bbe765275901fe SHA-256: 5f5a6e279d1623ef03907e49bed527786c52e566159409d169ee346593b1191b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious indicator is a link to 'ttraff.com', known malicious redirector infrastructure. While no scripts were extracted, the sheer volume of links and the identified redirector suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution.

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=pastel+yellow+hex
    • http://files.entartetekunstliteraryreview.com/uploads/1/3/2/7/132741144/vofubesuzuti-rapapepedopir.pdf
    • http://files.speakingofveganfood.com/uploads/1/3/0/7/130738836/89634825136cd.pdf
    • http://files.coolgeekzatl.com/uploads/1/3/0/9/130969920/043dce.pdf
    • http://files.twooneohdesigns.com/uploads/1/3/1/3/131380083/zipodasesofami_tuzoxajibikix_kojebofidixedim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bibekejufalakudogaloseja.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/30960641842.pdf
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/dell_latitude_e6530_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/35370511913.pdf
    • https://cdn.shopify.com/s/files/1/0431/9644/8917/files/fozazemibisonuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9494/files/series_ee_savings_bond_value_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/61104828778.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/madogoxoxogikufimidagakit.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/sapolutiraf.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/87846420514.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/mumafofofowar.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_off00005f7a.bin
273882a133426da46ddca2f50ba67a673cdfa009aab5fe01497c770c75314d85
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 4940 bytes
font_01_sfnt_off0000705e.bin
5636bb4f1bcbf09292d81860ec8ed071be4269532554a2e12bd4926f4b520ff2
pdf-font-stream PDF embedded font (sfnt) at offset 0x705E 14220 bytes