Malicious PDF — malware analysis report

Static analysis result for SHA-256 8554df2aa6bb5a6e…

MALICIOUS

PDF

45.6 KB Created: 2020-09-05 00:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d226649aaca8bf6559bbb5bb7d87bba6 SHA-1: 42d612abc093f73c7eea46938fba41ec8c8210a2 SHA-256: 8554df2aa6bb5a6e89a3bde15d501c92ffccf0b28455269fe741149807d33390
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is 'https://ttraff.me/pify?keyword=countries+of+the+world+quiz+answers', which is designed to lead users to further malicious content. The document body itself is heavily obfuscated and contains garbled text, but the presence of the malicious URL is clear.

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.me/pify?keyword=countries+of+the+world+quiz+answers
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/bugotor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/craigslist_org_myrtle_beach.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/ipad_pencil_annotation.pdf
    • https://cdn.shopify.com/s/files/1/0458/3289/6675/files/counter_strike_source_skins_pack.pdf
    • https://cdn.shopify.com/s/files/1/0432/5900/3038/files/imca_modified_setup_sheets.pdf
    • https://static.usrfiles.com/ugd/de60da_6fde4fa2b60f4ef48ee8934bb44c1e2a.pdf
    • https://static.usrfiles.com/ugd/0f5b72_fa6d0886c6cc47a9bac8ab974d88dbc6.pdf
    • https://static.usrfiles.com/ugd/0a0016_1753d2c5f4474826a20fb146ce215e0a.pdf
    • https://static.usrfiles.com/ugd/7dd30d_405186a931c34389bf884124fd44052c.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/way_of_the_long_death.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/hoja_de_seguridad_del_acido_acetico.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/colorimetric_chemical_analytical_methods.pdf
    • https://static.usrfiles.com/ugd/b65acf_1e153514537d448e873955772784a06b.pdf
    • https://static.usrfiles.com/ugd/77941b_4361c64dd36c467a82f229d14bb1a65b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006540.bin
bd9d0a1ca666511aa47c75af453c80de4cba6356afe87f6e62b2103c9610218b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6540 5168 bytes
font_01_sfnt_off000076e5.bin
eb13de5b2397a0031ac3be39feaab91e3bafca0a995b86ba1a878259c3916129
pdf-font-stream PDF embedded font (sfnt) at offset 0x76E5 10860 bytes
font_02_sfnt_off00009af8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF8 4324 bytes