Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ec2771d44b64de…

MALICIOUS

PDF

42.7 KB Created: 2020-08-13 06:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34e06bb94c36526dad713c41cc445784 SHA-1: 0d44df51312c832d08db9b96470bac06172c297d SHA-256: a1ec2771d44b64de4441fb2b9c7ce18f3605a65a71c10bf4f490126a18c6db52
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or distribution mechanism. The document body contains the URL that triggered the malicious redirector heuristic, indicating a likely attempt to lure the user to malicious content.

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.cc/pify?keyword=adaptive+control+astrom+pdf
    • http://files.counselingcreativelypllc.com/uploads/1/3/0/7/130775677/miruxujari.pdf
    • http://files.lightningridgerealestate.com.au/uploads/1/3/2/8/132815961/tuwor.pdf
    • http://files.wkmla.com/uploads/1/3/1/4/131407012/zawut-rosizowinixidib.pdf
    • http://files.abcipi.com/uploads/1/3/2/8/132814166/vifadaduvuradomawega.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/mofexuzoza.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/30081590973.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9566/files/79875672403.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/lulerugotesetonamesuli.pdf
    • https://cdn.shopify.com/s/files/1/0430/4312/7447/files/18199132568.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/mulozeloxafotekuwuvoxaw.pdf
    • https://cdn.shopify.com/s/files/1/0443/1160/9500/files/agreeing_and_disagreeing_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/94549561631.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/vopabanofidosuki.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/pdf_to_word_converter_online_free_without_email_id.pdf
    • https://cdn.shopify.com/s/files/1/0429/7850/8953/files/basotarilukedinerifivag.pdf
    • https://cdn.shopify.com/s/files/1/0439/4123/2795/files/88207710053.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2173/files/bise_lahore_10th_result_2020_gazette_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2133/files/netujumebalazisedurogipa.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/
    • https://cdn.shopify.com/s/files/1/0430

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067dc.bin
a99bebc1f4763df2fbac2a602fa557f5903a27ca9af68b667aea4a71bd2ddb0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DC 5352 bytes
font_01_sfnt_off000079f5.bin
9467c6bd8aa5b50082bb69a46ec5824b67a1712cb95d889082e9af6266daf29d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F5 10420 bytes

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