Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9898e4b14f1fcfe…

MALICIOUS

PDF

44.9 KB Created: 2020-08-15 00:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d088fdb0538dfd24df9f3db727a7a1ac SHA-1: 25bb8fa34c931fcf0aa6517a05a1730a8a02a80d SHA-256: d9898e4b14f1fcfec3ba3d6ad2a993fce81e40ec1692b9dc3db4606723891eb0
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body text and metadata suggest a lure related to 'materi laju reaksi kelas 11 pdf', likely to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=materi%20laju%20reaksi%20kelas%2011%20pdf
    • http://mafobomuk.delidelicious.com/uploads/1/3/0/8/130874285/ruzope.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/femixizozajonoxalaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/27676027467.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/integrated_grammar_exercises_for_class_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/fumopexazogesed.pdf
    • https://cdn.shopify.com/s/files/1/0429/6130/5756/files/4436362014.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/niwoninimufofap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/berliner_mauer_referat.pdf
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/livre_imam_al_ghazali.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2716/files/canon_mg5320_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/piper_archer_ii.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/cara_membuat_soal_di_google_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/la_cicala_e_la_formica_esopo_morale.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/orthogonality_of_bessel_functions.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/jinesitokajafiwilopule.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_off00007226.bin
62a8bc8261f66589e6fc786c8f1a9f98b4a26760d82817e92e6577fc9c650454
pdf-font-stream PDF embedded font (sfnt) at offset 0x7226 5232 bytes
font_01_sfnt_off00008411.bin
547b848d34817d3bb9f869407a8becea64461d08627e1f3816fc9f5cf295a120
pdf-font-stream PDF embedded font (sfnt) at offset 0x8411 10228 bytes