Malicious PDF — malware analysis report

Static analysis result for SHA-256 1493f39a1eb4f0a6…

MALICIOUS

PDF

48.4 KB Created: 2020-08-10 14:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dac3a2ed0ad41fa6aa97df46e3cc49d SHA-1: 45a984655ad350fabe7053ddae0e06fa3b186adc SHA-256: 1493f39a1eb4f0a6edd8bde0e9fc783868d98919f9d1b41bb1dab2c827c8a624
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=shri+aditya+hridaya+stotra+pdf'. The document body also contains links to algorithmically generated URLs, suggesting a link farm or SEO poisoning attempt to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=shri+aditya+hridaya+stotra+pdf
    • http://files.fourcornersveterinarysymposium.com/uploads/1/3/1/4/131455378/nivexokuv-voguje.pdf
    • http://losevile.dalestourism.com/uploads/1/3/1/3/131381204/deec3ce0.pdf
    • http://files.ihsknightsboysbasketball.com/uploads/1/3/1/8/131856224/lafuliza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/zodabipujuxagok.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/jovuteru.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/95154591363.pdf
    • https://cdn.shopify.com/s/files/1/0429/9168/1699/files/cna_resumes_objectives.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/tumepowug.pdf
    • https://cdn.shopify.com/s/files/1/0432/3118/3016/files/calculus_textbook_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/pugugawaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6245/0586/files/forex_bible_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/letarapupetetovetela.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/54735326677.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a04.bin
fc5b8243b7d9b9291f0d7d7ce1486d80adc94989997d1bd4504204e8c891ab66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A04 5304 bytes
font_01_sfnt_off00006c07.bin
13f1c1acb04f6a2c0c7809b473bb32c2578594c6ef10021f571feb2e59bba7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 3772 bytes
font_02_sfnt_off000077ad.bin
8838c848035229eb0f4318547151668472495d3b56a72a601f758d334630ac33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AD 13456 bytes
font_03_sfnt_off0000a30e.bin
a0ef8b47212504de5be126ba1582aab51696d557424db02680cd612c1c04a1a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA30E 4620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.