Malicious PDF — malware analysis report

Static analysis result for SHA-256 906e20e7bc8fffe8…

MALICIOUS

PDF

38.7 KB Created: 2020-09-01 19:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1a0351a67ba1db038eaabf1c5a865fe SHA-1: 060339a8d12a23db1e93fd36bdd8545befa2a7a4 SHA-256: 906e20e7bc8fffe81c47f04d62544d351dc9025bbc1298a727d748fa0a13a08d
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector service (ttraff.cc), suggesting a phishing or scam attempt. Another heuristic detected a large PDF link farm, with many links pointing to benign Shopify domains, but the presence of the redirector link is the primary indicator of malicious intent. 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.cc/pify?keyword=chitralekha+1964+movie
    • https://cdn.shopify.com/s/files/1/0462/9220/5729/files/website_quotation_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3651/files/catalina_mac_os_iso.pdf
    • https://cdn.shopify.com/s/files/1/0434/7186/3961/files/programa_para_convertir_de_a_word_love.pdf
    • https://static.usrfiles.com/ugd/f14cf6_59b9d86ab3824d1bb2bcd4cae5ad9fac.pdf
    • https://static.usrfiles.com/ugd/66c878_c21525992f0947688d05f52a73a7efc4.pdf
    • https://static.usrfiles.com/ugd/696b8a_33fa50ac6fd6472d94b3ce797e5208e5.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2637/files/apio_propiedades_nutricionales.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6985/files/nukeretawazuxomupewita.pdf
    • https://cdn.shopify.com/s/files/1/0437/0818/6792/files/boston_celtics_schedule_2019-_20.pdf
    • https://cdn.shopify.com/s/files/1/0459/6387/0368/files/cesur_kular_indir.pdf
    • https://cdn.shopify.com/s/files/1/0428/5687/4151/files/roxatekejaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/68471083142.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_off0000590c.bin
29693cbb284af378bd1eb8e32b399f1ed0d30c885564fb112fa19029b39894c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x590C 5228 bytes
font_01_sfnt_off00006aac.bin
518341e0959b5aa3195b5450b8ece991c491c404cc9a34bbe1b7e2ec4e57988f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAC 10436 bytes