Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9ed54c24fd0e99…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 00:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9824bfe5d665bd715f39a4e0690402e SHA-1: f7e4430a92411b70d9f7e4121bfaafc6eb8a06ad SHA-256: 5e9ed54c24fd0e99f8dd1f52091f6fd4030cf18a014766bc409a80decee915f5
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to suspicious or known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content. The presence of a link to 'ttraff.com', identified as a malicious redirector, and a link to a PDF hosted on a domain associated with link farms, strongly suggests a malicious intent to redirect users to potentially harmful content.

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.com/pify?keyword=full+form+of+rip+in+nepali
    • http://files.mromara.com/uploads/1/3/1/4/131452750/romabetonaxavi.pdf
    • http://botadurer.drumshotel.com.au/uploads/1/3/1/1/131164239/judajisibid.pdf
    • http://zesavitid.emmapickettbreastfeedingsupport.com/uploads/1/3/0/9/130969082/6255483.pdf
    • http://files.tarringtonswimteam.org/uploads/1/3/0/9/130969937/7332977.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0429/0379/7916/files/card_games_for_2_players.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/form_ba-_49.pdf
    • https://cdn.shopify.com/s/files/1/0434/2677/5196/files/subamuzugezupalijopoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/rozududojuxan.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/mother_child_images_hd_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5530/7159/files/lasixerizomofo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/5782075908.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8078/files/80354711695.pdf
    • https://cdn.shopify.com/s/files/1/0446/4377/8723/files/vafojixunabolejis.pdf
    • https://cdn.shopify.com/s/files/1/0435/9231/9139/files/mozumimegiwepexezov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/how_to_unfollow_a_page_on_facebook.pdf
    • https://cdn.shopify.com/s/files/1/0434/5570/9351/files/dixewamijisitapoxuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/88616391256.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_off0000653e.bin
0735f4ee0a5e3797e837e8cac56d1178675cfa16c7cb09b4dd8fbede3ba5782b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653E 4824 bytes
font_01_sfnt_off00007591.bin
cee490aa855def944781f5fb7108818f7445724d00044be4ebb4ba49c526268d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 10160 bytes
font_02_sfnt_off00009891.bin
a4e150e4019e94321b76ddc44cc06a7550180a561571fe93de6af3c23fa8a68d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9891 3920 bytes

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