Malicious PDF — malware analysis report

Static analysis result for SHA-256 14aec0bdbb4583a9…

MALICIOUS

PDF

44.0 KB Created: 2020-08-11 23:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33869547f3bdc779aea46cfe9ef7fd26 SHA-1: 2e175412f1fdc34e66aa9748447eebef3c59132f SHA-256: 14aec0bdbb4583a93bde8d8680d4fd7b928df8fd6c571c51e091d1afee0fcaa5
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm hosted on Shopify, but one critical link redirects to known malicious infrastructure via ttraff.cc. The document body text explicitly mentions 'Affairscloud current affairs monthly pdf download' and includes the malicious URL, suggesting a lure to trick users into downloading potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=affairscloud+current+affairs+monthly+pdf+download
    • http://files.nightowl-omnias.com/uploads/1/3/2/6/132682623/mokuluvevigesovapege.pdf
    • http://files.dealswithdessy.com/uploads/1/3/1/4/131483214/6ca95d8af945a18.pdf
    • http://files.cameronnazarene.org/uploads/1/3/0/7/130740458/dd42c5f42e75ef.pdf
    • http://files.kjequine.com/uploads/1/3/1/0/131070845/e1a20573207292a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/71856932376.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/hd_avi_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/6918/5943/files/download_nitro_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/5000_frases_mas_usadas_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/english_grammar_test_bank.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/pdf_tools_split_merge.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/lattices_and_ordered_algebraic_structures.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/sabipures.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0435/files/4_perspectives_of_balanced_scorecard.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/bis_in_idem_tributrio.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/52254558243.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e0f.bin
241fdbe86e6d6ed7d67d968218ae64a36247b784e8a3b1e5cecdb4fb6c7fdf66
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0F 5460 bytes
font_01_sfnt_off0000707d.bin
129318a7a651e7d203bf6da2b4864b2cbaa6d896c78317a8f2de9ca271d7a65d
pdf-font-stream PDF embedded font (sfnt) at offset 0x707D 10412 bytes
font_02_sfnt_off000093e1.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x93E1 4324 bytes